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|Title:||An Optically-Pumped Frequency Stable Tunable Maser and Infrared-Microwave Double-Resonance Experiments in Ammonia|
|Author(s):||Malk, Edward George|
|Department / Program:||Electrical Engineering|
|Degree Granting Institution:||University of Illinois at Urbana-Champaign|
|Abstract:||Microwave emission attributed to a linear cascade effect has been observed from ('14)NH(,3) optically pumped by a CO(,2) laser. The emission is tunable over the saturated homogeneous linewidth of the ground state sQ(5,4) inversion transition at 22.653 GHz. The circulating power density of the optically pumped emission is 0.54 watts/cm('2) at NH(,3) pressure of 0.91 torr and CO(,2) R(6)(,10) laser pulse energy of 60 mJ. The cell design and frequency characteristics are presented as an Appendix.
Infrared-microwave double-resonance experiments have been performed at higher microwave powers than reported in the literature. Two previously unreported double-resonances have been observed using a CO(,2) laser, aQR(2,1) (P(40)(,9) + 33.05 GHz) and aQR(2,2) (P(40)(,9) + 34.14 GHz). The cells designed and the data acquisition techniques developed are presented.
The linear and non-linear (i.e., single and multiple photon) spectroscopy of ('14)NH(,3) is considered in detail as the subject of an Appendix. Tables of energy levels, ground state inversion transitions, and laser-NH(,3) absorption matches are also included.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1980.
|Date Available in IDEALS:||2014-12-12|
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Dissertations and Theses - Electrical and Computer Engineering
Dissertations and Theses in Electrical and Computer Engineering
Graduate Dissertations and Theses at Illinois
Graduate Theses and Dissertations at Illinois